Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 6, Problem 6.12P
To determine
- Dose rate in milligrays per year.
- Dose rate in millirads per year.
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Chapter 6 Solutions
Introduction To Health Physics
Ch. 6 - A 50-µC/kg (approximately 200 mR) pocket dosimeter...Ch. 6 - Prob. 6.2PCh. 6 - Prob. 6.3PCh. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - Prob. 6.9PCh. 6 - Prob. 6.10P
Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Prob. 6.14PCh. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Prob. 6.17PCh. 6 - Prob. 6.19PCh. 6 - Prob. 6.20PCh. 6 - Calculate the average power density, in watts per...Ch. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.33P
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- A radiographic technique calls for 46 kVp and 28 mAs which results in an exposure of 278 µGy. What is the expected exposure if the technique is changed to 75 kVp and 14 mAs? Round your answer to the nearest whole number. Do not include units.arrow_forwardWhat is the half-life, t½, (in hr) when the concentration was 100 mg/L?arrow_forwardDensity is the ratio of mass to volume. If a uranium nucleus has a radius of 7.4 femtometers and nuclear mass of 238 AMU, what is its density in kg/m3? Assume the nucleus is sphere-shaped to find its volume.arrow_forward
- The rate of a simple enzyme reaction is given by the standard Michaelis–Menten equation: rate = Vmax [s]/([s] + KM) if the Vmax of an enzyme is 100 μmole/sec and the KM is 1 mM, at what substrate concentration is the rate 50 μmole/sec? Plot a graph of rate versus substrate (s) concentration for [s] = 0 to 10 mM. Convert this to a plot of 1/rate versus 1/[s]. Why is the latter plot a straight line?arrow_forwardSoon after taking an aspirin, a patient has absorbed 300 milligrams of the drug. If the amount of aspirin in the bloodstream decays exponentially, with half being removed every 2 hours, find, to the nearest 0.1 hour, the time it will take for the amount of aspirin in the bloodstream to decrease to 100 milligrams. hrarrow_forwardAnn analysed mercury content on a canned fish and the permissible limit of mercury in fish is 0.1 ppm. In this study, an average of 11.4 ± 2.1 ng/g was obtained based on six sample replicates. Suggest a suitable analytical instrument to be used in this analysis and draw a conclusion on the safety of mercury content of this canned tuna.arrow_forward
- Q1arrow_forwardIf the dose rate from a sample of Ra-223 was found to be 5.0 x 10-5 mSv per hour at 1.8 metres, calculate the dose rate at 4.8 metres. Show your calculations. Give your answer to two significant figures.arrow_forwardthe V•O2max of people tends to declineafter age 30 by about 9% per decade for sedentary individuals,but it declines less than 5% per decade for people who stay active.The average V•O2max in healthy 30-year-olds is about 3.1 L/min.Using the information given here, what would the average V•O2maxbe in 60-year-olds who have been sedentary throughout theirlives and in 60-year-olds who have stayed active (keep in mindthat the decline is exponential)?arrow_forward
- Q. 8: K.E. per unit volume is given by 3 2 (a) E=P (b) E=3 3 (c) E = mv² (d) None of these (CET-2003)arrow_forwardThe water is safe to drink if the number of cells falls below 10 cells/mL. It is 8 a.m. and you have 100,000 cells/mL with D being 15 minutes. You add the bleach to the tank. At what time can you release the water? Log Nt = Log N0 – t/D. D is the time required for a log kill.arrow_forwardThe cell-survival data in the table below fit a multitarget, single-hit survival curve. A)Find the slope at high doses. B) Find the extrapolation number. C) Write the equation that describes the data. Dose (Gy) Surviving Fraction 0.10 0.993 0.25 0.933 0.50 0.729 1.00 0.329 2.00 0.0458 3.00 0.00578 4.00 0.00072 Paragraph BIEEarrow_forward
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